US2964592A - Device for dials - Google Patents

Device for dials Download PDF

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Publication number
US2964592A
US2964592A US728961A US72896158A US2964592A US 2964592 A US2964592 A US 2964592A US 728961 A US728961 A US 728961A US 72896158 A US72896158 A US 72896158A US 2964592 A US2964592 A US 2964592A
Authority
US
United States
Prior art keywords
spring
dial
finger wheel
washer
spring washer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US728961A
Other languages
English (en)
Inventor
Sohlberg Carl Oscar
Nordstrom Oskar Edvin Rudolf
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Application granted granted Critical
Publication of US2964592A publication Critical patent/US2964592A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/26—Devices for calling a subscriber
    • H04M1/30—Devices which can set up and transmit only one digit at a time
    • H04M1/31—Devices which can set up and transmit only one digit at a time by interrupting current to generate trains of pulses; by periodically opening and closing contacts to generate trains of pulses

Definitions

  • This invention refers to dials used within automatic telephone systems, and more particularly to a device for regulating the spring tension of the driving spring between the finger wheel and the spring washer.
  • the object of the invention is to provide a device which makes it possible to regulate the spring tension in a simple way without dismantling any portions of the dial. According to the invention this is achieved in such a way that the spring washer is elastically and rotatably supported for movement between two different positions beneath a lap connected with the case of the dial.
  • the washer is provided with guide means which engage with corresponding devices in the lap.
  • the spring washer is provided with operating members which in a fully mounted dial are accessible from outside so as to make it possible to displace the spring washer between difierent positions.
  • Fig. 1 shows a cross section through the upper portions of the dial and Fig. 2 shows the dial as seen from above with the finger wheel partly cut off.
  • Figs. 3 and 4 are details on an enlarged scale showing the steering means of the spring washer. Only those details of the dial which are needed to explain the invention are shown in the drawing. The dial is otherwise supposed to be of normal design.
  • the finger wheel 1 and a spring casing 4 are fixed to the central spindle 13 of the dial by means of a screw 14.
  • the driving coiled spring 6, the object of which is to regulate the return motion of the finger wheel is, as appears from Fig. 2, with its outer end fixed to the spring casing and with its inner end to a spring washer 5.
  • This spring washer is made of thin plate and is elastically inserted beneath a lap 9 connected with the digit ring 2.
  • the digit ring is in the usual manner fixed in the case 3 of the dial, the spindle 13 being rotatably mounted in said case 3.
  • the spring washer is on the upper side of its outer edge provided with at least one guide detent means or stud 8, which engages with corresponding indent device or notch 7 on the lap 9, as is shown in Fig. 3 and in the cross section BB of Fig. 3, shown in Fig 4.
  • the spring washer 5 is also provided with one or more holes 10 and the finger wheel 1 is provided with corresponding holes 11 located across the holes in the spring washer.
  • the spring washer may be turned in one or the other direction. Owing to this the detents or studs 8 fall into the indents or notches 7, and the spring washer will be sufficiently locked in place. As a rule, the finger wheel and spring casing must be lifted from the spindle 13 at such a regulation and the spring casing must be turned in the desired direction.
  • a spring yieldably urging said finger wheel into one direction of rotation, said spring comprising a torsion spring fixed at one end to said finger wheel, the spring plate member rotatably supported upon said spindle base member, the opposite end of said torsion spring being connected to said spring plate member, means for maintaining the adjustably rotatable position of said spring plate member uponsaid spindle base member relative to said finger wheel to adjust the tension of said torsion spring, said means comprising circumferentially spaced apart detents carried by one of said spindle base and spring plate members, circumferentially spaced apart detents defined by the other one of said members releasably receiving said detents, regulating means for rotationally adjusting one of said spring members relative to the other one of said members whereby said spring is regulated, said regulating means comprising aligned apertures in said spindle wheel and said spring plate members slidably receiving a

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)
  • Springs (AREA)
US728961A 1957-04-17 1958-04-16 Device for dials Expired - Lifetime US2964592A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE839528X 1957-04-17

Publications (1)

Publication Number Publication Date
US2964592A true US2964592A (en) 1960-12-13

Family

ID=20354171

Family Applications (1)

Application Number Title Priority Date Filing Date
US728961A Expired - Lifetime US2964592A (en) 1957-04-17 1958-04-16 Device for dials

Country Status (5)

Country Link
US (1) US2964592A (enrdf_load_html_response)
DE (1) DE1048294B (enrdf_load_html_response)
FR (1) FR1194614A (enrdf_load_html_response)
GB (1) GB839528A (enrdf_load_html_response)
NL (2) NL226489A (enrdf_load_html_response)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2281994A (en) * 1938-12-17 1942-05-05 Gen Electric Co Ltd Impulse sender for use in telephone or like systems
US2469974A (en) * 1947-02-04 1949-05-10 Western Electric Co Telephone calling dial
US2543080A (en) * 1947-08-14 1951-02-27 Standard Telephones Cables Ltd Telephone dial type transmitter with adjustable main spring
US2716160A (en) * 1953-12-30 1955-08-23 Bell Telephone Labor Inc Brake for telephone calling dials

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2281994A (en) * 1938-12-17 1942-05-05 Gen Electric Co Ltd Impulse sender for use in telephone or like systems
US2469974A (en) * 1947-02-04 1949-05-10 Western Electric Co Telephone calling dial
US2543080A (en) * 1947-08-14 1951-02-27 Standard Telephones Cables Ltd Telephone dial type transmitter with adjustable main spring
US2716160A (en) * 1953-12-30 1955-08-23 Bell Telephone Labor Inc Brake for telephone calling dials

Also Published As

Publication number Publication date
DE1048294B (de) 1959-01-08
NL226489A (enrdf_load_html_response)
NL101043C (enrdf_load_html_response)
GB839528A (en) 1960-06-29
FR1194614A (fr) 1959-11-10

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